YII表单修改时显示原数据

<?php

use yii\helpers\Html;

use yii\widgets\ActiveForm;

use yii\captcha\Captcha;

$form = ActiveForm::begin([

    'action' => 'index.php?r=zou2/updates',

    'method' => 'post',

]) ?>

    <table align="center">

        <tr>

            <td><a href="index.php?r=zou2/index">添加页面</a></td>

            <td><a href="index.php?r=zou2/lists">显示页面</a></td>

        </tr>

        <tr><td colspan="2"><?= $form->field($model, 'id')->hiddenInput(['value'=>$res['id']]) ?></td></tr>

        <tr><td colspan="2"><?= $form->field($model, 'name')->textInput(['style'=>'width:250px','value'=>$res['name']]) ?></td></tr>

        <tr><td colspan="2"><?= $form->field($model, 'pwd')->passwordInput(['style'=>'width:250px','value'=>$res['pwd']])?></td></tr>

        <tr><td colspan="2"><?= $form->field($model, 'sex')->radioList(array(1=>'男',0=>'女'))?></td></tr>

        <tr><td colspan="2"><?= $form->field($model, 'tel')->textInput(['style'=>'width:250px','value'=>$res['tel']])?></td></tr>

        <tr><td colspan="2"><?= $form->field($model, 'email')->textInput(['style'=>'width:250px','value'=>$res['email']] )?></td></tr>

        <tr><td colspan="2"><? echo $form->field($model, 'content')->textarea(['rows'=>4,'value'=>$res['content']]) ?></td></tr>

        <tr><td colspan="2">

                <div class="form-group">

                    <div class="col-lg-offset-1 col-lg-11">

                        <?= Html::submitButton('修改', ['class' => 'btn btn-primary']) ?>

                    </div>

                </div>

            </td>

        </tr>

    </table>

<?php ActiveForm::end() ?>